PREX / CREX Collaboration Meeting and Status

Slides:

Advertisements

Similar presentations

Robert Michaels PREX at Trento PREX Workshop 09 Physics Interpretation of PREX 208 Pb E = 1 GeV, electrons on lead Elastic Scattering Parity Violating.

Advertisements

Robert J. Feuerbach Jefferson Lab Constructed from contributions from the HAPPEX Collaboration Hall A Collaboration Meeting December 5, 2005 HAPPEX-II.

Compton integrating method Beam test summary PREX/Happex Collaboration Meeting Alexandre Camsonne.

Extraction of G E n at Q 2 =1 (GeV/c) 2 by Measurements of May 1, 2011 Ge Jin University of Virginia.

Lead ( 208 Pb) Radius Experiment : PREX E = 1 GeV, Elastic Scattering Parity-Violating Asymmetry PREX : precise measurement of the density -dependence.

A Measurement of the Target Single-Spin Asymmetry in Quasi-Elastic 3 He (e, e) Joe Katich for E and the Hall A Collaboration Two-Photon Physics World.

Lead ( 208 Pb) Radius Experiment : PREX E = 1 GeV, Elastic Scattering Parity-Violating Asymmetry PREX : density -dependence of the symmetry energy. Nuclear.

Measuring the Neutron and 3 He Spin Structure at Low Q 2 Vincent Sulkosky for the JLab Hall A Collaboration College of William and Mary, Williamsburg VA.

Stefan Roesler SC-RP/CERN on behalf of the CERN-SLAC RP Collaboration

Lumi Analysis for HAPPEx III / PREX Presented by: Luis Mercado UMass - Amherst 5/18/2007.

R. Michaels PVDIS at Nov 2009 Beam Requirements for PVDIS Property ValueRun-Avg Hel. Correl. 1-Day Hel. Correl. Energy 6 and 4.8 GeVdE/E < 1 ppm < 5 ppm.

Quartz Scanner for Qweak Jeff Martin University of Winnipeg.

1/22 MOLLER Juliette M. Mammei. 2/22 Working Groups Polarized Source Hydrogen Target Spectrometer Integrating Detectors Tracking Detectors Polarized Beam.

Noise Analysis for PREx - Pb Radius Experiment Presented by: Luis Mercado UMass - Amherst 6/20/2008.

“THE OLYMPUS LUMINOSITY MONITORS” Ozgur Ates Hampton University 1  A Review of the MC Studies of the Lumi Monitors  Some GEM Reports from PREX at JLAB.

Parity Violation in Electron Scattering Emlyn Hughes SLAC DOE Review June 2, 2004 *SLAC E122 *SLAC E158 *FUTURE.

PN12 Workshop JLab, Nov 2004 R. Michaels Jefferson Lab Parity Violating Neutron Densities Z of Weak Interaction : Clean Probe Couples Mainly to Neutrons.

E08-005: A y 0 in Quasi-Elastic 3 He(e,e’n) Scattering Elena Long Hall A Collaboration Meeting December 17 th, /17/2013Hall A Collaboration MeetingElena.

Proton Form Factor ratio GEp/GMp with polarization method --on behalf of Jefferson lab GEp3 collaboration Wei Luo Lanzhou University, China April

C-REX (little sister of PREX) : Parity-Violating Measurement of the Weak Charge radius of 48 Ca to 0.03 fm. 1-pass (2.2 GeV) HRS + septum C-REX Workshop.

Collimator June 1-19, 2015HUGS The collimator is placed about 85 cm from the target and intercepts scattered electrons from 0.78° to 3.8° Water cooled.

A study of systematic uncertainties of Compton e-detector at JLab, Hall C and its cross calibration against Moller polarimeter APS April Meeting 2014 Amrendra.

Nuruzzaman ( Hampton University Group Meeting 1 st November 2011 Beamline Optics Using Beam Modulation for the Q-weak Experiment.

Pb Electroweak Asymmetry in Elastic Electron-Nucleus Scattering -- Weak charge form factor -- most weak charge is carried by neutrons PREX and.

Presentation by T. Gogami 2015/6/15 (Mon). Equation state of neutron matter.

1/33CREX Workshop Jefferson Lab March 16-19, 2013 NASA/CXC/SAO.

Preparation for E Pi0 Collaboration Meeting Tuesday Feb R.Lindgren.

PVDIS at JLab 6 GeV Robert Michaels Jefferson Lab On Behalf of the HAPPEX Collaboration Acknowledgement: Talk prepared by Kai Pan (MIT graduate student)

Pb Electroweak Asymmetry in Elastic Electron-Nucleus Scattering : A measure of the neutron distribution PREX and CREX 48 Ca Neutron Skin Horowitz.

Parity Mtg, 7 Dec 2007 Bob Michaels Test Target for PREX and e06007 (tilted) No “active” cooling, conducts to Loop 3.

Neutron Flux Measurement at the CYRIC T. Horiguchi and A. Ishikawa (Tohoku University) For the FPCCD group.

A Measurement of Two-Photon Exchange in Unpolarized Elastic Electron-Proton Scattering John Arrington and James Johnson Northwestern University & Argonne.

MOLLER Collaboration Meeting May 2014 Hall A Update Thia Keppel 1.

Measuring the Spin Structure of 3 He and the Neutron at Low Q 2 Timothy Holmstrom College of William and Mary For the Jefferson Lab Hall A Collaboration.

GEp-III in Hall C Andrew Puckett, MIT On behalf of the Jefferson Lab Hall C GEp-III Collaboration April 15, 2008.

The Q Weak Experiment Event tracking, luminosity monitors, and backgrounds John Leacock Virginia Tech on behalf of the Q Weak collaboration Hall C Users.

PREX Mtg, July 2008R. Michaels, JLAB Warm Septum : Status Septum Team: Kees deJager, Paul Brindza, Javier Gomez, John Lerose, Al Gavalya, & me New Design.

HAPPEX DAQ / ADC Tests Luis Mercado UMASS 4/17/09.

PREX Issues. Outline New issue: souce systematics and Aug. 07 run. Update on old issues. Progress at SU.

Moller Polarimeter Q-weak: First direct measurement of the weak charge of the proton Nuruzzaman (

Run Coordnator Report 2012/04/ /04/10 Jixie Zhang

John Leacock April 20, 2009 Qweak: A Precision Test of Standard Model and Determination of Weak Charge of the Proton Four fundamental interactions of the.

Hall A Update Thia Keppel User Group Board of Directors January 2015.

Overview of Onsite Progress Jian-ping Chen g 2 p /G ep Collabroation Meeting.

Hall A Collab. Mtg, 6/ 2010R. Michaels, JLAB Lead ( 208 Pb) Radius Experiment : PREX E = 1 GeV, Elastic Scattering Parity-Violating Asymmetry PREX : precise.

Understanding the 3 He Nuclei: Asymmetry Measurements in Quasi- Elastic Ge Jin University of Virginia For the E Collaboration.

R. Michaels, JLab PREX Mtg, July 2008 Recent Cavity Monitor Tests Credit: John Musson, Anna Boehle, Vince Sulkosky Good position & current for 10 nA to.

Pb-Parity and Septum Update Presented by: Luis Mercado UMass - Amherst 12/05/2008 Thanks to Robert Michaels, Kent Pachke, Krishna Kumar, Dustin McNulty.

Status of Polarimeters and Polarized Targets: what are the plans for development of polarized targets to meet the needs of the Day 1 and future experimental.

In the SM to the first order x: variable relevant to the nucleon internal structure Q 2 : Four-momentum transfer squared between the electron and the target.

g beam test of the Liquid Xe calorimeter for the MEG experiment

Chen-Ning Yang Tsung-Dao Lee Chien-Shiung Wu In 1972, PVDIS result from SLAC E122 was consistent with sin 2 q W =1/4, confirmed the Standard Model prediction;

CLAS, Hall-B Tagged linear and circularly polarised photons

Sanghwa Park (Stony Brook) for the PREX/CREX Collaboration

Kellogg Radiation Lab, Caltech Pasadena, CA

Data Acquisition (DAQ) Status

Measurements of the Neutron Skin of 208Pb and 48Ca

Noise Analysis for PREx - Pb Radius Experiment

Accelerator Issues Raised in Hall A Parity Collaboration Meeting, April B-Team Meeting April 29, 2009.

PREX: Lead / Diamond Target

Bubble Chamber – Beam Requirements

Lead ( Pb) Radius Experiment : PREX

Special Considerations for SIDIS

Hall C – this week Time Period Plans 10/24-10/27 Target cool down

Physics Interpretation of PREX

Polarimeter Detectors for 12 GeV Hall C GEn measurements

Run Coordinator Report for PVDIS (E08-011)

Parity – Violating Neutron Density Measurements : PREX, C-REX

GEn-RP engineering & design Status

Presentation transcript:

PREX / CREX Collaboration Meeting and Status Oct 1 – 2, 2017 http://prex.jlab.org/cgi-bin/DocDB/public/DocumentDatabase http://hallaweb.jlab.org/parity/prex Report by Robert Michaels p1 / 11

PREX and CREX Asymmetry is non-zero due to weak interaction. 208Pb 48Ca PREX-I PREX-II CREX PREX-I : PRL 108 (2012) 112502 227 citations Rn - Rp (fm) Asymmetry is non-zero due to weak interaction. Weak interaction “sees” neutrons (electromagnetic sees protons). number of nucleons A Neutron skin Lead Nucleus Can theory predict its size ? Rn Rp p2 / 11 R. Michaels, Hall A Mtg, Oct 3, 2017

Engineering Progress -- Robin Wines Skyshine shield Target Septum Magnet collimator HRS Quad 1 beam Man-weeks design 24 Man-weeks engineering (minus target) Jessie Butler: ~70 days installation p3 / 11 R. Michaels, Hall A Mtg, Oct 3, 2017

Target -- Silviu Covrig Target group responsible CFDFAC thermal calculations performed to understand and improve the design port p4 / 11 R. Michaels, Hall A Mtg, Oct 3, 2017

Radiation Simulation -- Ciprian Gal (UVa) Shielding Design Target and Septum Region HRS Q1 Skyshine shield Skyshine shield target septum plastic shield HRS controls New since ERR : Beam Dump being considered (work in progress) Beam dump Need concrete shielding ? R. Michaels, Hall A Mtg, Oct 3, 2017

Magnetic Shielding -- Jay Benesch Confirmed that Al Gavalya’s shield design inside septum is good Proposed a 3 mm thick conical carbon steel shield for HRS quad p6 / 11 R. Michaels, Hall A Mtg, Oct 3, 2017

Integrating Detectors -- Dustin McNulty Placed above the VDCs in HRS detector stack Idaho State University Quartz bar PMT Two (redundant) quartz bars, which intercept elastically scattered electrons. We integrate this signal for our main signal. Design similar to PREX-I. Beam tests at Mainz confirm simulation. p7 / 11 R. Michaels, Hall A Mtg, Oct 3, 2017

GEMs -- Dustin McNulty Supplement the VDCs in HRS Idaho State University Supplement the VDCs in HRS So we can do Q2 measurements at ~1 uA (rates high) These are “small” 10 x 20 cm2 400 um pitch Capitalizes on SBS developments (INFN / Uva) p8 / 11 R. Michaels, Hall A Mtg, Oct 3, 2017

PREX/CREX Detectors -- Dustin McNulty GEMs (3) Quartz (2) Quartz (2) p9 / 11 R. Michaels, Hall A Mtg, Oct 3, 2017

“SAM” (Lumi monitor) -- Tao Ye Stony Brook University A source of extremely high rate  Establishes a “noise floor” Corrections for beam noise are consistent with expected beam position monitor resolution. BCM resolution 12 ppm Result: SAM statistical level 60 ppm p10 / 11 R. Michaels, Hall A Mtg, Oct 3, 2017

Other Topics at PREX/CREX Meeting Oct 1-2, 2017 at JLab Software and Optics Seamus Riordan (Argonne) Ryan Richards (StonyBrook) Detectors Tyler Kutz (StonyBrook) Carlos Bula (Idaho St) 4K running Grigory Eremeev (Jlab) Nonlinearities Devi Adhikari (Idaho St) Moller Polarimeter Bill Henry (Temple) Kerr Studies Fernando Araiza Gonzalez (StonyBrook) Compton Polarimeter Juan Carlos Cornejo (CMU) Polarized Source Joe Grames (Jlab) Caryn Palatchi (Uva) DAQ Status Bob Michaels (Jlab) Scheduling Thia Keppel (Jlab) Last page R. Michaels, Hall A Mtg, Oct 3, 2017